Lump in groin

just wanted to reassure any of you worrying having discovered lump in groin. I discovered one before Xmad.It took 12 weeks having had two ultra sounds to measure and it went over the weekend! It was 13 mm and felt hard and nobbly. I was so worried having had breast cancer and my mother had lymphoma at my age (60) many sleepless nights thinking the worst and am so relieved. Not every lump us cancer thank goodness.